Century L4-2.2L VIN 4 (1994)
Radiator Cooling Fan Motor: Description and Operation
Circuit Operation
Each Coolant Fan is turned ON and OFF by a separate Coolant Fan Relay. The Primary Coolant Fan Relay coil is grounded by the Powertrain Control
Module (PCM) when vehicle speed is less than a speed determined by the PCM and the Engine coolant reaches 1O8°C (227°F) with A/C OFF or 1O6°
C (223°F) with A/C ON. The relay contacts close and voltage is applied through the Primary Coolant Fan Relay to the Primary Coolant Fan. The
Primary Coolant Fan runs until the Ignition Switch is turned "OFF," or Engine coolant temperature decreases to 1O4°C (22O°F) with A/C OFF, or 1O2°
C (216°F) with A/C ON.
The Pusher Coolant Fan Relay coil is grounded by the PCM when the Engine coolant temperature reaches 118°C (245°F). The relay contacts close and
voltage is applied to the Pusher Coolant Fan. The fan then runs at high speed and will continue to run at high speed with the Ignition in "RUN" until the
Engine coolant temperature lowers to 114°C (238°F).
